Ore-crushing stamp-mill.



P. R. STA NHOPE. ORE GRUSHI'NG STAMP MILL.

APPLICATION FILED we. 12, 1911.

Patented May' 21', 1912.

2 SHEETS-SHEET 1.

P. R. STANHOPB.

ORE GRUSHING STAMP MILL APPLICATION FILED AUG. 12, 1911. 1,026,? 1 7.

Patented May 21, 1912;

I 2 SHEETS-SHEET 2 I Mew?" iwahm 4O 1 designates the mortar block for the ore PHILIP a. s'ranfiorrl, or DENVER, oonoi'mno.

oar-causative STAMP-MILL.

"specification of i-etters iatent.

Patented MayZi, i912;

Afi'plication filed August 12, 1911. Serial No. 64am.

To all whom it may concern: 7

Be it known that I, PHILIP R. STAN'Horn, a c t zen of the United States of America. residmg 1n the city and county of Denver which the followingis a specification...

My invention relates to improvements in orecrushing stamp mills, and the objects of my lnvention are: First, To provide a portable, easily constructed, :inexpensive ore crushing stamp mill that can be easily and quickly erectedin out-of-t-he-wa-y and practically inaccessible places, for the general 5 types of ore crushingmachinery in. general use. Second. To provide an ore. crushing mill, parts "ofwhich can be made of raw materials generally found where the mill is to be erected. I attain these objectsby the mechanism illustrated in the accompany- "ing drawings,'in which: 1 i Figure l is a side elevation of a stamp mill embodying myinvention, the screen, which is supportedupon the mortar block, being in section. Fig. 2 isa plan view of the same. Fig. 3 is a perspective view of the stamp showing the same secured to the forward end .of the lever or beam by which itis operated. Fig. 4: is a transverse sectional View ofthe stamp beam, showing a roller carrying stirrup thereon, to which is attached a spring for exerting a downpullon the stamp beam. Fig. 5 is a side view of the improved hopper screen, and'Fig. 6 is'a plan view of the screen frame or hopper, the screen bars being'removed. Similarreference numerals refer to similar parts throughout the several views.

Referring to the drawings: The numeral crusher. This mortar block may be constructed of any suitable material; my invention, however, contemplates its manufacture of concrete from gravel, sand and broken rock abounding in the vicinity of the site of the mill, leaving only the cement to ,he transported into the mountains to the mill site. This mortar block is provided with a Step2, which surrounds it, and which 0 is located close to the top of theblock.

Upon the top of the block is placed an iron plate 3, which is provided with a rectangular recess or depression of slight depth, in

which is seated adie 4, the plate 3, being held stationary upon the top of the block and State of Colorado, have invented a new and useful Ore-Crushing Stamp-Mill, of

by the smaller end of a hopper screen, which isconst-ructed as follows: The screen comprises upper. and. lower rectangular frames 5. and ,6, respectively, which are connected either by boards for by sheet metal to form a hopper, three sides of which are provided with.rectangular; open; 'ings 7, substantially of the .width: of the lower end of the hopper. If desired, how-.. ever, these openings maybe formed in any. one, or in all of the sides of the hopper. The lower frame 6, of,thehoppenrests upon the step 2, as shown in Fig. 1, and by"surroun( ling the plate 3, on allsides, prevents sliding movement of the same. In line with the openings 7, the frames. 5 and 6, are each provided with a seriesv of V-shaped; grooves or recesses 8, in which are. PlilCQd SlQ11bhfS 9, which are tri-angular in -crosssse c tion,the sides being of equal width, and these bars: constitute the screen proper; The fiat sides of these screen bars lie inward, ;and=, the spaces between their adjoiningedges dee terminethe mesh of the screen;=t-he spaces? being increased or diminished in :width, by varying the distance between the: V- shaped grooves 8, as will be understood. The screen bars" are held in place: 'by1st'rips.- IO, of either wood or metal, whiclniarefscrewed to the inside facesof-the frames'5 andfi, against the upper and lowe'r ends cf: the said bars,as shown in the drawings. :By this arrangement, the bars may be quickly secured and when the edges of any of the bars become worn, or jagged from .the-impact of the ore asit is in process of fcrushing, 'the said bars may be withdrawnand turned to bring a fresh edge in p]ace,twith=: out removing the retaining strips 10. The upper and lowerhopper frames 5 and 6, support the V-shaped screen bars with one of their flat sides inward and one of their edges outward, which arrangement provides a large clearance area between the screen bars beyond their adjoining edges.

The bars maybe adjusted to give a dis worn away, and they can also be turned end for end.

A feed chute 11 is arranged to feed ore into the hopper screen onto the die.

A stamp 12 is employed, which may also side of a block 16, which is also provided upon its upper side with a corresponding dove-tailed slot 17, in which one end of a beam or lever 18 is secured; this lever 18 preferably comprises a plank of any wood such as hickory having an inherent spring- -ing property, and its end which fits into the dove-tailed recess of the stamp is beveled to fit the dove-tailed recess tightly, but is arranged to be driven further through the stamp block as its forward end wears away or becomes splintered from the vibratory action of long use.' This plank is adapted to exert a downward resilient pressure that will enable it to strike an effective ore crushing blow when raised and released by a cam '19, such as is commonly used in stamp mill practice. To accomplish this I secure the opposite end of this plank in a substantially fixed position by a yoke clip 20, to a support comprising a cross beam 21, which is supported on "upright beams or posts 22. This end of the plank is arranged to extend through and beyond the clip 20 a short dis tance to permit the plank to be moved forward as its stamp end wears away.

Intermediate of the support 21 and the mortar block 1, and adjacent to said mortar block, I secure suitable foundation or supporting blocks 22", upon which bearings 23 are secured, in which a shaft 24L is mounted. On this shaft is mounted a double ended camor tappet 19, in such relative position to the under side of the plank that it will bear on a wearing plate 26, which is secured to the underside of the plank and raise the plank and allow the stamp block at its end to drop as the ends of the tappet escape the plate, as is well understood. A driving pulley 27, is also secured on the shaft 24 and is connected by a belt 28, with a power driven shaftnot shownby which the pulley,

with its shaft and tappet, are rotated and the stamp beam raised.

In order to supplement the gravity action of the stamp 12 and block 16, together with springing action of the stamp beam or plank, in"--"accomplishing the quick drop. of the stamp, I provide a yoke or stirrup 29, between the ends of which is mounted a roller 30, which rests upon .the top of the stamp beam. To. the depending end of this yoke is secured one end of a coil spring 31, of sufiicient stifi'ness to exert the required pull upon the beam. The other end of this spring is secured to an eye bolt 32, which is secured in any suit-able fixed object, such as a floor beam, or a block embedded in the ground. Thus as the ends of the tappet alternately release the stamp beam it will be drawn violently downward by the'combined action of gravity and of the spring 31, causing the stam to deliver in quick succession, sharp, resilient, blows upon the ore as it feeds in upon the die. 4

While I have shown the faces of the die and stamp on a horizontal plane, they may be inclined slightly towardthe front side of the screen if desired. It will be understood that the stamp is designed to be used in connection with any preferred style of screen other than that illustrated in the drawings,

Having described the invention, What I claim and desire to secure by Letters Patent, is: i

In a stamp mill as specified, the combinatron with a support, of a resilient beam-secured at one end to the support;'a stirrup having a roller mounted therein, which rests upon said beam between its ends; a coil spring for exerting a down pull upon said.

stirrup; a stamp on the free end of the beam; a mortar operatively positioned relatively to the stamp; and a cam between the stamp and stirrup for raising'and releasing the stamp end of the beam.

In testimony whereof I aifix my signature in presence of two witnesses.

' PHILIP R. STANHOPE. Witnesses:

G. SARGENT ELLIOTT, ADELLA M. FowLE. 

